Sam had 35 red and yellow marbles. If 60 percent of the marbles are yellow how many RED marbles does sam have?

14 red marbles

Step-by-step explanation:

60% of the marbles are yellow  and there is a total of 35 marbles.

60% of 35 is 21, so there are 21 yellow marbles.

35-21= 14,

leaving you with 14 red marbles.

throw the computer

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15